Improvement in lathes for turning broom-handles



NrTnn STATES Trice.

PATENT PETER PRESOOTT, OF BOONEVILLE, NEIV YORK, ASSIGNOR TO HIMSEIJFAND G. Il. POST, OF SAME PLACE.

llVlPROVEMENT IN LATHES FOR TURNING BROOlVl-HANDLES.

Specification forming part of Letters Patent No. 33,1166, dated OctoberS, 1861.

To @ZZ whom, t mayconccrm Be it known that I, PETER PREsco'r'r, ofBooneville, in the county of Oneida and State of New York, have inventedcertain new and useful Improvements in Machinery forTurningBroom-Handles; and I do hereby declare that the following is a full,clear, and exact description thereof, reference being had to theaccompanying drawings, making a part of this specification, in ,which-Figure l is a longitudinal section through the improved machine in thevertical plane indicated by red line 0c x in Fig. 2. Fig. 2 is a topview of the machine complete. Fig. 3 is a back view of the plate whichcarries the grooVing-cutter. Fig. 4 is a face or front view ofthe same.Fig. 5 is a front View of the cutter-head of Figs. l and 2.

Similar letters ot' reference indicate corresponding parts in theseveral figures.

To enable those skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

A representsthe table for containing and supporting the machinery whichI am about to describe.

B B B B are four rollers carrying the feed-wheels ce a a a', the formerof which feed the work to the cutters, while the latter draw away thefinished handles. Shafts B B and B B have pinion spur-wheels bb b b ontheir ends, the lower two of which wheels engage with a large spur-wheelO, as shown in Fig. l of the drawings, and as this wheel C is rotated inthe direction indicated by arrows in Fig. l it gives rotary motion tothe lower wheel Z), and this wheel b rotates the upperwheelb. The lowerwheel b rotates the upper wheel b', and also the large wheel O. One ofthe lower shafts B carries on one end a large spur-wheel B2, whichreceives arotary motion from the short tool-shaft D, through theniediurn of bevel-pinion c, large bevel-wheel c', and Vpinion spur-wheel(l, and the four feedwheels a a a a are thus rotated in the directionindicated by the arrows in Fig. l, and they have a proper relative speedwith that of the cutting device, as will be hereinafter fully explained.The upper feed-wheels a a should be allowed to have an upward yieldingmotion, so that they will accommodate .themselves to the varyingthicknesses of poles which are passed between them.

The tool-shaft D is supported in bracket-- bearings D D', projecting outfrom and secured to one side of the table A, as shown in Fig. 2. On thisshaft D are three belt-wheels e e e, the middle one of which is fixed tothe shaft D, and the side wheels c e are loose on this shaft. Thus whenthe belts which drive the shaft D are thrown off on either one of theside pulleys e e the shaft D will not be turned.

D2 D are levers for shifting the belts which drive shaft D.

E is a strong beam, which extends longitudinally through the top oftable A and which is in the middle of this table. On this beam or bed Ethe cutting ,apparatus is mounted. F F are two stationary bearing-blockssu pporting the hollow horizontal spindle G in their upper ends. Thisspindle G is arranged longitudinally between the two pairs of feedwheelsa 'a ct a and in such a positionv with respect to these feed-rollersthat the sticks passed between rollers ct a will be directed into thehollow spindle G and by this spindle directed between the rollers a a atits opposite end.

G is a belt-wheel which is keyed to the hol- Y low spindleG, and overthiswheel a belt passes, which communicates a rapid rotary motion to thespindle G from `the main driving-shaft kA. The bearing-blocks in whichspindle G turns do not allow this spindle to haveany longitudinal or endplay.

H is a flanged collar, which is put upon spindle G and allowed to havean end play only on this spindle. This collarllI has an annular groove fin its periphery, into which groove plays a pin g, which is on the shortarm of a bifurcated lever I, which is pivoted at g to the table A. Thelong arm of this bifurcated lever I projects under the spindle G, andits end passes into a cam-groove h in the side of spur-wheel O, as shownin Fig. l of the drawings. The collar H will thus receive its end playon the spindle G from the cam-groove hin wheel O, through the medium ofvibrating lever I. The flange H on sliding collar H has two holesthrough it, which receive pins@ t', that project from expandingcutter-blocks kk through slotted holes which are made through thecircular plate G2. The plate G2 is secured on the end of the spindle G,(shown in Figs. l and 2,) and on the outside surface of this plate G2the knife-carrying blocks 7a lc are pivoted, and as the collar H ismoved back and forth on spindle G these knife-blocks 71: k are operatedby the flange H on this collar H, so as to give the desired taper tot-he stick, which is passed through the hollow spindle G. This taperingis effected by the movement of the collar H toward the plate G2, whichcauses the knives to gradually approach toward the center of the spindleas the stick passes through this spindle and is rounded.

Fig. 5 shows the knife-blocks k 7a, which' are pivoted at. Z Z to theplate G2. The knives m m have beveled cutting-edges, which cnt away thewood and round the stick as it is fed between them by the rollers d d.The pins '1l i, which project from the back of the blocks throughslotted holes through the plate G2 and through holes in flange H divergefrom the axis of the spindle, as shown in Fig. l, so that when thecollar H is moved toward the plate G2 tlieknife-carrying blocks 7c 7care moved away from the aXis of the spindle, and when this collar H ismoved from the plate G2 the knife-blocks are made to approach the axisof spindle G.

The cutter-head G3 (shown in Figs. 3 and 4 of the drawings) carriesstationary knives 7c 7.; on its outside surface, the cutting-edges of,which knives are beveled outward, as described for the knives in Figs.l, 2, and 5. On the back surfaceof the circular head G3, invFigs. 3 and4, a knife-block n is pivoted, carrying a knife p. A pin r projects fromthe block n, which passes through a hole in the flange of collar H, andby means ofa suitable cam, which is made to act upon the long arm oflever I, the knife p can be made to cut grooves in the broom-handlewhile the knives k la are rounding this handle.` This single cutter p isintended merely to groove thehandles at proper points, and for plainhandles it will not be used.

The operation of the machine above described is as follows: Motion iscomn1uni-v cated to the main shaft A', and from this shaft rotary motionis transmitted to the spindle G by a belt s, and also to the largespurred cam-wheel C and feed-roller shafts B B B B', through belts.pulleys, and spurwheels, as before described. The machine now being inmotion, a stick of wood of the proper length is'placed on theguide-table N and pushed endwise between the rollers cta and up to therotating cutters m m which round the stick as it is fed through thehollow spindle G. y At the commencement of the operation of rounding thestick orhandle the cutter-blocks k k are separated as far as they canbe, and as the work progresses these cutters are made to graduallyapproach each other by the operation of collar H upon the pins t' i,actuated by the forked lever I, o ne end of which works in a cam-shapedgroove hin the large wheel C, while the other end plays in the annulargroove fin collar H, all as before described. Then as the cutters m mare rounding the stick they are at the same time gradually reducing ortapering it, and as the smallest end of the rounded stick leaves thecutters this stick is received between the grooved rollers a a, whichconduct the finished handle ont of the spindle G. The cutter P on shaftD isused to roundthe small ends of the handles after they have passedthrough the spindle G.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The arrangement ofthe pins 2', perforated flange H', and sliding collarH with the slotted circular plate G2, pivoted knife-blocks 7c k, andpivoted cutter carrier n, as herein shown and described.

PETER PRESCOTT.

Witnesses:

REUBEN NIcHoLs, JOHN HAoKnTT.

